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Normalized facet joint capsule principal strains during 20 min of static lumbar flexion (SLF) and 10 cycles immediate post static flexion (Post) were increased compared to their pre-creep magnitude (shown as the dotted line on the graphs). After 20 min of recovery (20 Post), facet capsule strains were still large. Bars on graph show the 5th–95th percentiles of the data. E1 and E2 are the principal strain closes to the x- and y-axis, respectively.
